<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>话费查询系统</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
</head>
<body>
<h1>话费查询系统</h1>
<nav>
    <ul>
        <li><a th:href="@{/billing/info}">费用查询</a></li>
        <li><a th:href="@{/billing/records}">话单查询</a></li>
    </ul>
</nav>

<div th:replace="~{::#content}"></div>

<script>
    // 你可以在这里添加通用的 JavaScript 代码
</script>
</body>
</html>